May · Argentina
Best time to visit Iguazu Falls in May Weather, crowds & prices
Weather in Iguazu Falls in May
Average temperature 19°C, 165 mm of rain, about 24 days with 6+ hours of sunshine and 81% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
7.4/10
Ranked #5 of 12 months
- Avg temp
- 19°C
- Rainfall
- 165 mm
- Humidity
- 81%
- Days with 6h+ sun
- 24
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Iguazu Falls scores 7.4/10 for nature and wildlife travel - an above-average month (#5 of 12). Expect around 19°C, 165 mm of rain, and roughly 24 days with 6+ hours of sunshine this month.
Iguazú Falls spans the Argentina-Brazil border, with walkways above and below the river's main cascades.
May in Iguazu Falls — reliably good (5th best month)
May averages 19°C (66°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Monthly rainfall reaches 165 mm — wet for this destination — but about 24 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 7.4/10 here, 5th of 12 months, against 8.7/10 in the destination's best month.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella, footwear you can get muddy.
Figure on mid-season pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Iguazu Falls in May?
- In May, Iguazu Falls averages 19°C, 165 mm of rain, and about 24 days with 6+ hours of sunshine. Its climate-comfort score is 7.4/10.
- Is May a good time to visit Iguazu Falls?
- May earns a 7.4/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Iguazu Falls in May?
- Expect about 165 mm of rain in May. Average humidity is 81% and there are about 24 days with 6+ hours of sunshine.
Curated in Iguazu Falls
Tickets & experiences
Things to do in Iguazu Falls
Iguazu Falls, Argentina. Live activities and tours from GetYourGuide, matched to this destination.